000 AXPZ20 KNHC 171605 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Sun Sep 17 2017 Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 1200 UTC surface analysis and satellite imagery through 1545 UTC. ...SPECIAL FEATURES... The center of Tropical Storm Norma at 17/1500 UTC is near 20.9N 110.5W, or about 125 nm SSW of Cabo San Lucas Mexico, moving NNW or 340 degrees 04 knots. The estimated minimum central pressure has risen to 1003 mb. The maximum sustained wind speed is 40 kt with gusts to 50 kt. Latest satellite imagery indicates that Norma is weakening as noted in it lacking deep convection. The only deep convection consists of scattered moderate isolated strong from 21N to 23N between 110W and 112W. Scattered moderate convection is from 20N to 21N between 110W and 112W. Norma is forecast to weaken to a depression near 22.2N 113.2W by early on Tuesday. Please see the latest NHC Forecast/Advisory under AWIPS/WMO headers MIATCMEP2/WTPZ22 KNHC for more details. The center of Tropical Storm Otis at 17/1500 UTC is near 16.3N 127.3W, moving N or 360 degrees at 2 knots. The estimated minimum central pressure is 9991 mb. The maximum sustained wind speed is 50 kt with gusts to 60 knots. latest satellite imagery shows that Otis continues to strengthen as noted by its rapidly organizing banding features and what appears to be a an eye feature developing. Numerous strong convection is within 60 nm of the center in the NW quadrant. Scattered to numerous strong convection is elsewhere within 60 nm of the center, except 30 nm in the E quadrant. Otis is forecast to continue to strengthen as through early Monday as it reaches near 18.0N 127.5W, with a maximum sustained wind speed of 55 kt gusts to 65 kt. Otis is then forecast to weaken afterwards as it moves NW then WSW through the middle of next week. Please read the latest NHC Forecast/Advisory under AWIPS/WMO headers MIATCMEP5/WTPZ25 KNHC for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from NW Colombia to 09N79W to 10N90W to 14N104W. It resumes at 14N131W to 11N140W where it transitions to the ITCZ west of 140W. Scattered to numerous strong convection is within 60 nm of the axis between 133W and 137W. Scattered moderate isolated strong convection is within 60 nm of the axis between 79W and 85W, also from 10N to 13N between 95W and 99W, within 120 nm S of the axis between 97W and 100W and W of 137W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please refer to the special features section for more information about Tropical Storm Norma. Gulf of California...Moderate to strong winds associated with Tropical Storm Norma are entering the southern section of the Gulf. These winds will continue into early Monday. Large southerly swells that are associated with the cyclone already are impacting the waters that are S of 28N. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR...Moderate SW winds will prevail S of the monsoon trough through Thursday. Light and gentle variable winds will continue N of the monsoon trough through early Tuesday. The monsoon trough then will lift to the N with moderate to fresh SW winds prevailing. REMAINDER OF THE AREA... High pressure ridging extending in a NW to SE fashion across the area will maintain a moderate to fresh anticyclonic wind flow over the area N of the monsoon trough and W of about 122W through Wednesday. $$ Aguirre